Threonine is an essential amino acid in humans. It is abundant in human plasma, particularly in newborns. Severe deficiency of threonine causes neurological dysfunction and lameness in experimental animals. Threonine is an immunostimulant which promotes the growth of thymus gland.
The Union Pacific Railroad, Building America. The Union Pacific (UP) is one the largest and most powerful railroads in the country. This historic system has been in operation since before the Civil War and much of the general public has at least a general knowledge of UP since it formed the eastern segment of the Transcontinental Railroad.
East Broad Top Railroad and Coal Company. The East Broad Top Railroad and Coal Company (EBT) is a for-profit, 3 ft (914 mm) narrow gauge historic railroad headquartered in Rockhill Furnace, Pennsylvania, 19 miles (31 km) north of Interstate 76 (the Pennsylvania Turnpike) and 11 miles (18 km) south of U.S. Route 22, the William Penn Highway.